Molding-machine.



PATBNTED JUNE 23', 1908. H. TABOR & w. LEWIS.

MOLDING MACHINE.

APPLICATION FILED DBO 19,1905.

2 SHEETS-SHEET 1.

INVENTORS 4M. ATTORNEY.

No. 891,608. 'EPATENTED JUNE 23; 1908. H. I'ABOR & W. LEWIS.

MOLDING MAGH INE. APPLICATION FILED nn o d, 1905.

2 SHEETSSHEET 2.

LEWIS residin HARRIS TABOR, OF ELIZABETH, NEW JERSEY e s orri'on.

, AND WILFRED LEWIS, OF PHlLADELPHIA,

I PENNSYLVANIA, ASSIGNORS TO THE TABOR MANUFACTURING COMPANY, CAMDEN,

NEW JERSEY, A CORPORATION OF NEW JERSEY.

MoLniNc-MAcnmE.

Application filed December 19, 1905. Serial No. 292,;32.

Specification of Letters Patent.

. Patented June 23, 1908.

To all whom it may concern:

Be it known that We, HARRIS TAnoR, residing in Elizabeth, in the county of Union, in the State of New Jersey, and WILFRED in Philadelhia, in the county of Phila, elphia, in the tate' of Pennsylvania, both citizens ofv the United States of America, have invented a certain new and useful Improvement in Molding-Machines, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part thereof. Our invention relates to molding machines of the kind generall known as split pattern power ramming n10 ding machines.

The object of our invention is to simplify and compact the structural details of sue machines, and generally to improve their construction.

The nature of our improvements will be best understood as described in connection with the drawings in which they are illustrated and inwlnch Figure .1, is a plan View of our machine with the ramming head cut away on the section line 11 of Fig. 2. Fig.2, is a side elevation of our machine shown partly in section to illustrate the construction and operation of the locking pin, which, when engaged, prevents lateral movementof the pattern plate.

Fig. 3, is a cross sectional view on the line 33 of Fig. 4, and Fig. 4, is a vertical sec-' tional ele'vation'on the line 4-4 ofFig. '3.

A, is the ramming cylinder, which by our construction forms essentially the base of the machine.-

A, A, are lateral extensions from the bottom of the cylinder forming bearings for the shaft which supports the yoke, said bearings communicating with the transverse chamber or cavity A formed in a rib A extending across through the bottom of the c linderl As shown, the lower section A of t c cylinder A, into which the rcssure fluid is introduced through the pipe is of somewhat greater diameter than the upper section A in which the ramming or squeezing plunger fits, the pipe B, being continued into the enlarged lower section of the cylinderso as to leave only a restricted assage between it and the bottomoi' the p unger D, when Said plunger approaches its lowermost osition A, is a perforated lug extending from the upger side of the cylinder. 7 a is a shaft extending through the chambered rib in the cylinderA, and s'hp orted in thebearings A, the projecting en s of this shaft having secured to them the hubsC, C,

from which extend the arms C C which through appropriate connections support the yoke C D, is the squeezing plun er working in the cylinder A, and made hollow to serve as a receptacle for fluid and also, as will bedescribed, to receive the attern drawing cylinder. A groove D, is ormed in the bottom of the plunger to conform its shape to the rib A and the botto rnof the cylinder in which it works.

D indicates a ort by which pressure fluid is introduced. an exhausted from the chamher in the plum er. Lv

E, is the bee. of the plunger, through the center of which is formed the circular open ing'indicatd at E, the head slulpporting the u wardly extending arms E, etc, some of which, at their to s, are formed with the lateral extensions in icated at E The port E is formed in the head as a continuation of the port D, a flexible conduit F, connecting this port with the source of fluid pressure.

G, is a frame resting on the tops of the standards or uprights E, and forming in effect a part of the pattern plate I, which is firmly secured to the frame G, in practice, the frame being made separate by preference, for reasons which will suggest themselvesto those familiar with the art. This frame G, is attached to the upper ends of flexible rods G, G, etc, which rods are attached at their lower ends to the head E.

G is a; bracket extending out from the frame (l, and to which is attached a vibrator as indicated at H. conical holes G see Fig. 2, are formed in the frame G, where it extends over lateral projections E of the standards E, the conical perforation being continued into the standards as shown at E terminating,-by preference, in cylindrical portions E A conical At two or more pointspin 1, is inserted in the conical holes described, and is pressed downward b a spring I, held in place bya screw cap so that the action of the pins is to lock theipattern plate, through the frame G, to the standards E, so to prevent lateral Vibration or movement, the lifting of the locking pins, on the other hand, leaving the pattern plate free to vibrate laterally under the influence of the vi 5 brator H. This lifting of the locking pins is accomplished through fingers or rods R, secured to brackets A of the cylinder-A, and so placedthat the ends of the pins come in contact with them when the pattern plate is in its lowermost position.

I, and i are pins and pin holes ada )ted to engage the corresponding part on the l ask in the usual manner.

'J, see Fig. 4, is a cylinder situated within the hollow plunger D, and secured to its head through theannular flange J, the upper part of the said cylinder indicated at J extendin through the circular opening E in the hea. E, but not coming in contact with it, thus leaving an annular gutter J which is in communication with the reservoir in the plsnger D, through a valved port indicated at *J. By preference, we form on the inside of the cylinder J, and near the top of the res- 5 ervoir in thecylinder D, an annular groove .J communicating with the reservoir space through a port or ports J". Api e K, connects the lower end of the cylin. er J, with the reservoir of the cylinder 1), and we have shown this pipe as having an elbow K reaching down to the bottom of the reservoir and pgiening into it through a restricted passage a lar er port K being provided. for the esca e pressure fluidand controlled by a bal valve K .L, isa hollow plunger working in the cylinder J, and sup orting at its top a plate M,

which plate, t rough pro'ectin lugs, M,

M, etc, supports the stan ards O, to the 49 upper ends of which is secured the flask frame 0.. Otherprojecting lugs M M of the frame M,have attached to them the downwardly extending rods Q, Q, which extend throu h thimbles Q, in lugs E of the head E, an en port'througli heads Q abutment Springs Another lug E of the head E, has secured to it the downwardly extending rod S, which extends throu h the perforation in the lug A, as shown in ig. 4, 50 and prevents rotation-of the plunger D,- in

l the cylinder A.

N, is a lampburnersecured to thetop of the late M, and having a wick N, extend ing own into the hollow plungeriL.

There is nothing essentially nciw in the squeezing head and its mechanism as indi-, cated in the drawings, except in the constructive arrangement of'the shaft C, with respect to the s ueezing cylinder A, and we have'not, there ore, further illustrated this mechanism.

It is obvious that on the introduction of pressure fluid through the ipe B, the plunger D, will be forced upwar carrying with it 5 all parts secured to and supportedby the plunger, as is desirable and necessary for the ramming or squeezing function of the machine.

In practice, the reservoir space in the hollow plunger D, is partly filledwvith oil, the upper section of the reservoir-being thrqugh the ports D, and E and the conduit 1*, in communication with a reservoir of compressed air. When it is desired to draw the pattern, the air is admitted into the reservoir and the oil forced through the pipe K, into the bottom of the pattern drawing cyl+ inder J, forcing the plunger K, u ward and through its head M, and the stan ards O, 0, etc., lifting the flask frame 0, above the pat- 30 tern plate I. The function of the groove J is twofold. In the first place, it intercepts any oil which may be forced up between the cylinder J, and plunger L, and permits its escape back into the reservoir through the port J, and, in the second place, in case any air has by accident gotten into the bottom of the cylinder J, the groove and its ports also afiord a means for lettin this an escape back intd the reservoir. T e function of the oil groove or gutter J is to intercept any oil which may escape from the top of the cylinder J, such intercepted oil being ermitted to flow back into the reservoir t rough the valved )ort J when the reservoir is not un-- l 1 ,95

der ressure.

T e utilization of the hollow plun er L, as

a lamp reservoir to feed the burner below the pattern plate, has obvious advanta es.

The other details of the mechanism il ustrated, their functions and modes of opera tion are sufiiciently obvious and clear in view of the descriptionalready given.

I Having now described our invention, what we claim as new and desire to secure by Let- 5 ters Patent, is'if 1. In a molding machine a squeezing cylinder having a transverse closed chamber formed through its base, extending into the cylinder, and connecting with shaft bearings formed in lateral extensions of the cylinder,

in combination with a shaft passing, through said chamber, and supported in said bear ings, a squeezing head connected to said shaft and a squeezing plunger working in the 5 cylinder.

2. In a molding machine a squeezin cylinder having a transverse perforatedextending through its bottom hfcombination with ashaftpassing thronghsaidperforation, a squeezing head connected-tesaid shaft and a squeezing plunger-working in the ,cylinder and having its bottom conformed to that of said cylinder. K

3. In a moldin machine the combination of a stationary vcy inder, a squeezing plunger working therein, a pattern drawing cylinder contained in said plunger and a plunger working in said pattern drawing cylinder.

4. In a molding machine the-combination I fluid to and from the reservoir of the squeezing lunger, and a pattern drawing plunger wor ing in the cylinder carried by said plunger.

' 5. In a molding machine the combination I of a cylinder, a squeezing plunger working therein, a pattern drawing cylindercontained in said plunger, a hollow plunger working in said pattern drawing cylinder, anda lamp burner opening from the hollow pattern drawing plunger below the pattern plate.

6. In a molding machine, a hollow squeez ing plunger and a pattern drawing cylinder secured to and extending within the squeezing plunger, a piston working in said cylinder, said plunger being formed with a liquid catching groove surrounding the pattern drawing cylinder, and a passage connecting said groove with the interior of said plunger,

,sos

plying liquid under pressure to the interior said cylinder tot move said piston, relative r li Y3 7.,In'j'a molding machine, ahollow squeezthereto.

i,ng'plunger, a pattern drawing cylinder yecured to andextending within said plunger,

said cylinder being formed with an-annular: groove J 5 in its inner surface ahove its lower" end, and a port or ports'leading from said groove vto the interior -'of the squeezing plum ger, a iston worki 'in' said cylinder,

means or supplying lquid under 4m the interior of said cylinder-at its ower end;

8. In a molding machine conical locking;

he patternplate' pin or pins for connecting t to tlfi pattern drawing mechanism so as to prevent lateral movement'thereon, in com bination with a spring acting to seat said pin,

and a fixed pin raising finger placed toeontact with'and disengage said plate is in lowermost position v I I annals 'rABoRJ.

. e WI ED E IS- Witnesses: I

ARNOLD KATZ,

a valve in said passage, and means for sup- D. STEWART. 1

pin 'when the 

